They can sell a car as new no mater how many miles are on it so long as it has never been titled in some ones name.
My cousin bout a "new" 96 S10 in 97 that had 15,000+ miles on it. The truck was used by a GM rep and then sold as a "New" demo truck.
But he got the thing for a good deal. 6.5K off sticker and they put new tires on it, a bed liner and threw in an extended warranty for free.
With 1,300 miles and that build date I would walk away now.